Drilling machine



A. G. ANDERSON.

DRILLING MACHINE- APPLICATION FILED JUNE 25, I921.

Patented Oct. 117, 1922.-

INVENTOR.

Patented Unit. 1?, i922 AXEL G. ANDERSON, OF CHICAGO, ILLI1-T0I$.

DRILLING Application filed June 25,

To all whom it may concern Be it known that I, AXEL G. ANDERSON, a citizen of Sweden, residing at Chicago,,in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Drilling Machines, of which the following is a specification.

My invention relates to drilling machines, and has particular reference to hand, or so called breast drills. The object of my invention are to provide improvements in the jointed types of these machines for the purpose of enlarging their scope of opera tion, lessening their cost, and simplifying the mechanism while at the same time giving increased adaptability and serviceability in situations and places to which access may not be had by former constructions; to provide a construction of increased commercial practicability, or which is available to the average user instead of being limited to those only who can afford to purchase the more expensive machinery and tools; to pro vide a machine with an articulated" frame and rotary spindle that provides sections which are adjustable angularly relative to the plane of rotation of the main driving gear and to each other, one of said sections being confined, substantially, to the chuck-end of the machine body, or in which substantially only the drill or bit itself, may be inclined to said body without moving the major portions out of their-usual alinements; to provide a construction and arrangement in which the drill, or its substitute, is operative laterally to the main spindle, and yet in parallel relation thereto, to, substantially, the extent of the throw of the operating crank or handle or the radius of the driving gear, and which may also be alined or arranged concentrically with the main spindle as in the old or conventional constructions; to provide facilities for operating the drill or bit when pointed toward as well as away from the operator, for the purpose of gaining access to otherwise inaccessible places, and to provide such other advantages and facilities as will appear from the novel combination and arrangement of parts hereinafter described in dc tail, illustrated in the accompanying drawing and more particularly pointed out in the appended claims.

In the drawing- Figure 1 is a side elevation of an embodiment of my invention.

MACHINE.

1921. Serial No. eeoas.

Figure 2 is a similar view taken in a vertical plane' at right angles to the plane of Figure 1, and showing the jointed sections in changed positions.

Figure 3 is a section taken substantially on the line 3 3 of Figure 1.

Figure l is a reduced viewshowing the chuck-carrying section reversed to place its spindle section in alinement with the ot e1- sections of the driving spindle or shaft.

In the several views the usual. gears and spindle supporting frame is divided into three sections 2, 3 and at with pivoted yoke or fork portions in which the bevel or miter gears are mounted. The section 2 carries in the usual or any preferred manner the customary main driving gear or wheel 5 provided with a fixed or adjustable handle or crank 6. ihe section 2 is provided with a forked portion with arms, branches or horns 7 and 8 which terminate in pivotbearing lugs 9 and 10 which are pivoted to lugs 11 and 12 on a widened and bifurcated portion of the section 3 on a pivot 13 at one side and a similar pivot 14: at the opposite side. The section 3 is of skeleton form with an opening 15 therethrough for an intermediate spindle 16 which has its journal-bearings at 17 and 18 at the ends of the transverse opening 15. To the lower end of said intermediate spindle section 16 is keyed, as at 19 (Fig. 3) a hemispherical gear wheel 20 in the upper or plane side of which is a depression 21.. To the upper end of the spindle 16 is keyed a bevel gear or pinion 22 and from its spindle bearing portion 17 projects bearing arms or posts and 24, the latter having an inwardly enlarged portion, or bearing-lug, 25 in which and the part 23 is supported a pivotspindle 26. On the latter is revoluhly mounted a wheel with gear teeth 27 and 28 on its respective sides faces. The teeth. 28 are arranged to mesh with the teeth on the pinion 22 and the teeth or cogs 27 mesh in a similar manner with a bevel pinion 29 which is keyed to a chuck-carrying spindle 30 journaled in a bore made for it in the section f The spindle section 30 has an end-thrust bearing 31. in a bearing-lug 32 on anarm, or fork-portion, on the frame-section a. A substantially similar arm or fork portion 34 projects from the opposite side of the section 42 and the lower end of the latter arm or fork portion is mounted on the pivot spindle 26.

On the end of the horn or fork portion 10 and arranged at right angles to the main driving gear 5 is a quadrant-like plate 85 in which is an arc-shaped slot 36 which is concentric with the bearing lugs 11 and 12. The arc-slot 36 is shown engaged with a bolt or screw 87 which has threaded engagement as at 38 with one of the wings of the enlarged or fork portion of the frame-section 3. By tightening the head of the screw or bolt 37 against the plate 35 the sections 2 and 3 will be held immovably relative to each other either in normal alinement or at any adjusted angular relation. While the simple screw or bolt arrangement is shown in connection with the part 35,

other of the many well known locking devices for this purpose may be employed to effect relative immovability of the parts 2 and 3.

A substantially similar arrangement for preventing movement ofthe parts or frame sections 3 and 4-. on the pivot-spindle 26 is provided in the form of an open ring 39 arranged around the periphery of the double gear wheel 2728. This ring, which functions in substantially the same manner as the plate 35, has its ends secured by soldering or otherwise at 40 and 41 to the opposite sides of the section 3. A set-screw, or bolt, 42 is brought tobear against said ring, and has engagement witha threaded bore in the arm 3%, but other suitable equivalent means may be employed for holding the parts 3 and 4: in fixed relation to each other..

As shown in Figures 1 and, 2 the framesection 1 is offset to one side of the section 8, but with its shaft 30 substantially parallel to the shaft or spindle 16 when the parts are in normal position, or as in Figure 1. This offset, or lateral arrangement, is serviceable in drilling a hole close to and parallel with a wall or surface which would come within the path of rotation of the driving gear 5 were the shafts or spindles 16 and 30 alined. The substitution of the parallel offset where available gives the operator approximately the same power or purchase on the machine that would be had with the spindles 30 and 16 al'ined, which power or purchase must be sacrificed to. some extent where the drilling is made with the section 4: adjusted angularly on its pivot 26 and where in many cases auxiliary support must be provided in applying pressure to the drill. However in all cases more stability is had and less purchase on the machine is lost where the angular adjustment takes place near the drill than where it is had at or near to the axis of the driving gear 5. In the present arrangement even the axis 11 and: 12 be.- tween the frame-sections 2 and 3 is, removed from the axis of the wheel 5 as to leave that part of the frame intact which carries the main driving gear and its operating handle by the provision of the hemispherical gear 20 which has its swinging axis (ll-12) at the periphery of the large driving gear 5. As shownin Figure 2, the hemispherical gear wheel or pinion 20 will operatively mesh with the teeth. on the wheel 5 at a great variety of angles of inclination up to a position where its axisof rotation is approximately at right angles to the plane of rotation of the wheel 5. When thus adjusted and the parts 3 and 4 arranged at right angles to each other as in Figure 2 a hole may be drilled in the direction of the op. erator of the machine by pulling instead of pushing-upon it, and, of course, if considerable resistance isv offered to the work of the drill auxiliary means for bringing pressure against the drill would be em loyedi and such expedients would be determined by the special conditions surrounding the work to be done by a breast drill as distinguished from the predetermined situations for which the larger and permanently mounted drilling machines are provided.

In Figure 4 the section 4: is shown reversed to place. the spindles 30 and 16 nor mally in alinement, or the pinion 29 over the pinion 22 and both meshing withthe gear teeth 28, instead of one pinion mesh-ing with one side of the double gear wheel 27-428 while the other meshes with the other side. This makes the drill substantially the same as the ordinary breast drill in that the driven spindle is practically continuous from the driven gear 20 to the chuck 43.

Having thus described my invention; I claim as new and desire to secure' by Letters Patenti 1- In a breast drill, the combination in a frame consisting of three pivoted together sections having their pivots arranged at right angles to the axis of themain driving gear, of a'plurality of spindle sections each of which is provided with intermeshing pinions operable at different angles of inclination of said spindle sections, and means for holding said sections fixedly in their adjusted positions.

2. The combination with a breast drill having a driving and driven gear, a spindle rotatably mounted and angularly adjustable in said frame relative to and to be rotated by said driving and driven gear, of a chuckcarrymg section pivotal'ly connected with said frame, said chuck-carrying section having a comparatively short rotary spindle, plnions 'operatively' connecting said first mentioned spindle and short rotary spindle, and meansv for adjusting and holding in the adjusted position, at different angles of inclination relative to the main spindle, said short rotary spindle.

3. In a breast drill, the combination of a frame consisting of three pivoted together sections, the first of which, orthe' main driving wheel section, carrying the driving gear wheel While the remaining sections carry rotary spindles With pinions keyed thereto and meshing with, respectively, the driving gear Wheel and with each other, with a hemispherical gear wheel, meshing With said driving gear wheel, means for adjust-ably supporting the axis of rotation of said hemispherical gear Wheel at an inclination to the axis of rotation of said main driving gear wheel, and means for similarly adjustably supporting the second and the third of said frame sections,

4i. In a breast drill the combination of a spindle-carrying frame in three sections, the first of which carries the usual driving gear and the last the chuck, said first and last sections being movable parallel with but laterally to the long axes of the remaining sections, and means for adjustably holding said sections at variable inclinations to each other at right angles to their plane of parallelism.

In testimony whereof I have hereunto signed my name.

AXEL G. ANDERSON. 

